Molding-machine.



\ PATENTED NOV. 13, 1906 E. L. MARTIN. MOLDNING MACHINE. APPLIUATION FILED Nov. 1o. 1905.

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i UNITED sTATEs EARL vL.` MARTIN,l or wooDBURN, iowA.

Speeication of Letters Patent. i

Patented Nov. 13, 190e.

To @ZZ whom, it mali/concern- Be it known that I, EARL Ii. MARTIN, a

citizen of the United States, and a resident of Woodburn, in the county of Clarke and State of Iowa, have invented a new and Improved Molding-Machine, of which the following is a full, clear, and exact description.

` My invention relatestov a-molding-machine capable of general use for the-formation of various kinds of articles from plastic materials, but is 'more especially designed for molding hollow building-blocks.

The principal-objects of the invention are to'so construct a machine of this character, including the mold, as to permit the production of blocks at exceedingly lov:r labor cost .and at the same time to make a block that will mature in a shorter time than with ordinary machines on account of permitting the Re erence is to be had to the accompany-l use of a-wetter mixture'than is ordinarily employed. Further objects of the invention Q W11 a together onejof the ends is pear below.4

ing drawings, forming a part of this specifil cation, in which similar characters of reference lindicate corresponding parts in all the views.

Figure 1 is a longitudinal sectional View on the line 1 1 of Fig. 2, showing a machineconstructed in accordance with my invention.

Fig. 2 is a sectional view of the same on the Aso.

line 2 2 of Fig. 1. Fig. '3 is a ers ective view of the mold partially opene `an showing the building-block therein, and Fig. 4 is a erspective view of the pallet.

prefer to use a support 9, preferably in the orm of a bench or table of just sufficient height to ermit the necessaryoperatins. This table as a perforation 10, and on this table I place-a; pallet 11. This pallet, as shown in Fig. 4, is preferably provided with cleats 12 on the bottom to hold it above the table, and with perforations 13 registering with the perforation 1() for the passage of any cores that may be used in the construction of the article to be molded. The is intended to constitute the bottom of the .mold The mold is so constructed as to form an article of the desired shape. In the present instance I have illustrated this art of the invention as comprising four wal s, a side wall 14, to which are pivotally connected two end walls 15 and 16, and on one of these end walls is rigidly mounted a second side wall 17. From an. inspection of Fig. 3 the Application iled November 10, 1905. Serial No.286,680

\ faces pallet way in which the mold opens will be obvious. Thevend walls being swung4 outwardly upon their pivots, it will be seen that the surfaces thereof, as well as the molding-surface of the side wall A17, will be gradually and progressively separated from the surfaces of the molded article from one end to the other. This does away with the sudden separation of all arts of any one of the molding-surom the molded article at the saine time,"which is a feature of many forms of molds and molding-machines. The separation of the mold parts in this sudden manner is'liable to injure the molded article unless it is in aperfectly hard state onaccount of the formation of inclosed spaces producing a' certain degree of vacuum when the walls are removed. This disadvantage is entirely overcome by the principle involved in the mold y illustrated.

For thepurpose of holding the mold parts rovided with hooks 18 and the movable si e with latches 19 for engaging them. VYliile a plurality of latches are em loyed, they are preferably vided with a andle20, so thatthey can be o erated simultaneously by lifting the hand e. I have also /sliowii one end provided with a handle 21 and the stationary side with a handle 22 for use in lifting and otherwise handliii the mold.

In or er to accurately center the mold upon the pallet, certain of thesides and ends' are provided with clips23, which extend downwardly from their lower edges.

These vcli 's 'connected to et er, and one of them is proy are spaced sufficiently from the sides of t e 'I mold-walls to en age the edges of the pallet, which is preferab y somewhat larger than the outside'of the ino d, and consequently when the mold is lclosed the walls thereof are al wa s iii the same osition with respect to the pal et. I have s iown these clips as being mounted i/ipon angle-irons 24, which form the lower edges 0f the several walls of the mold. Similar irons 25 are located at the tops ofthe walls. t

In case the article to be molded is to be under cut at the ends, I provide each of the ends y with a rojection or core 26.

Anot ier im ortant feature of the invention is a shiel `27, which is located upon one of the side walls,'preferably the rear one, or the one toward which the operator throws the molding material in filling tlie mold. This IOO IIO

shield is slanted outwardly and upwardly fromthe wall upon which it is located, so

' that when molding material is thi-ovm in it will prevent any irom passing over lthe rear wall of the mold and being lost or eccupying a position in which it will-be in the w ay. The moldin material striking this shield slides down t e inclined surface thereof into the mold, and conse uently all the material which is thrown upon t ie up er surface of the mold finds its way within t e latter.

I have mentioned the fact that the pallet. .is perforated to allow the passage of cores.

' Iier the purpose of molding hollow buildingwith vertical guides 31 and with studs 32.

Viith these studs are pivotally connected links 33, having bent lower ends 34 to permit the operation to be described. These links are ivotally connected with arms 35 on an osci ,atable shaft 36, which is mounted in bearings 37 upon the frame of the machine.

This shaft is rovided with an operating-lever 38. Itw1 l be observed that the lever 38 is located at an acute angle with respect to vthe arm 35 and that the bearings 37, and

consequently the shaft 36, are located out of the line of movement of the frame and coreplate 29. B constructing the parts in this manner and bending the link 33 as shown in Fig. 1 it is possible to secure a very quick motion of the core-plate and to locate the lever 38 in a convenient position for manipulathe plate tion by the operator.

The operation of the machineA will be readily understood. The lever 38 being operated in such amanner as to bring the core into the position shown in dotted linesin Fig. 1 and the mold-box being closed on the pallet, which can be done by simply bringing the parts together without devoting any attention to the centering thereof, the moldin material is introduced, struck ofi", and tampe in the lusual manner.

On account ofthe construction of the mold material can be introduced in a comparatively wet state, and consequently matures more rapidly than is usually the case with mixtures used for this pur ose. When it is sufficiently set to permit t e removal of the mold, the handle V20 is lifted and the three movable walls simultaneously withdrawn inthe pro ressive manner mentioned above. The wal 14 can then be drawn back in any desired manner, the clips 23 preventing it from moving inwardly. If desired, a faceiece having any required configuration can e used in this mold; but as this isa common feature in'molds of this character I have not illustrated it. Either after or before the meldfwalls are removed the lever 3.8 is turned from the position shown at the left in Fig. 1 to that shown at the right, and that motion rapidly withdraws the cores by allowing the frame 30 to descend by gravity. This motion is accuratel guided by the rods 31, and it will be seen t at all the parts which it is necessary for the operator'to handle' are located at a convenient place, so that the entire o eration of removing the mold parts from the molded article is accomplished with minimum labor and with great rapidity. These acts having been accomplished, the pallet, with the molded article thereon, can ne moved back on the table and a fresh pallet substituted, so that the molding operation can be repeated while the article just produced is being removed to a proper place to dry.

It is believed that the many advantages of this machine will` be readily apparent and that they need not befurther referred to except to sa inl a general way that by actual use it has een demonstrated that the rapidity of operation is such as to permit the production of blocks at the rate of one cent each for labor, and, furthermore, it is desired to call attention to the absence of gears and cogs, which are a feature of many kinds of molding machines and which in use frequently become clogged with molding mate.

rial and require cleaning.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. A molding-machine comprisinga support, a core-plate mounted below it, a guide for said plate, and means for reciprocating toward and from the support, comprising an L-shaped link pivotally connected with the plate, an oscillating shaft, an arm on the shaft pivotally connected with vthe link, and a lever on the shaft, said lever making an acute angle with the arms, said shaft being mounted out of the line of motion of IOO ITO the core-plate, whereby the core-plate can be rapidly dropped from the sup ort.

2. The combination of a pa let and a mold,

the pallet being of larger dimensions than t e mold, and clips on the mold for engaging the edges of the pallet for centering the mold thereon, the mold being composed of a series of side and end walls, the end walls being pivoted to one side wall and the other side wall being rigidly mounted on one end wall.

3. A mold comprising side and end walls, the end walls being pivoted to one of the side walls, and the opposite side wall being rigidly mounted on one end wall, whereby all arts of the molding-surface can be progressively removed from the product from one end to the other.

4. A mold comprising side and end walls, i

mounted on oneend Wall, the first-named 5 Inv testimony whereof I have signed my side Wall having a handle projecting beyond l name to this specification in the presence of one ofthe end Walls and the rigdlyemounted l two subscribing Witnesses. side Wall having a`1atch on its opposite end l EARL L. MARTIN.

lrojecting beyond the other end Wall, the AWitvnessesz fast-named end Wall havnor a hook for re- W. W. SWISHER, oeiving said .latch and a handle. 4 7 W. L. GORSIS. 

